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2014

Detectability of Weak Lensing Modifications under Galileon Theories

Park, Youngsoo, Wyman, Mark

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Theories of modified gravity attempt to reconcile physics at the largest and the smallest scales by explaining the accelerated expansion of our universe without introducing the cosmological constant.

One class of such theories, known as Galileon theories, predict lensing potentials of spherically symmetric bodies, such as dark matter halos, to receive a feature-like modification at the 5% level.
With the advent of next-generation photometric surveys, such modifications can serve as novel probes of modified gravity.
Assuming an LSST-like fiducial dataset, we produce halo-shear power spectra for LCDM and Galileon scenarios, and perform a Fisher analysis including cosmological, nuisance, and Galileon parameters to study the detectability of the aforementioned modifications.

Detectability of Weak Lensing Modifications under Galileon Theories · Around

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